mirror of
https://git.osgeo.org/gitea/postgis/postgis
synced 2024-10-24 00:52:40 +00:00
st_isclosed polyhedral surface
git-svn-id: http://svn.osgeo.org/postgis/trunk@5819 b70326c6-7e19-0410-871a-916f4a2858ee
This commit is contained in:
parent
b782000a54
commit
f402f7f828
|
@ -651,7 +651,7 @@ FROM (SELECT ST_BuildArea(
|
|||
<refname>ST_IsClosed</refname>
|
||||
|
||||
<refpurpose>Returns <varname>TRUE</varname> if the
|
||||
<varname>LINESTRING</varname>'s start and end points are coincident.
|
||||
<varname>LINESTRING</varname>'s start and end points are coincident. For Polyhedral surface is closed (volumetric).
|
||||
</refpurpose>
|
||||
</refnamediv>
|
||||
|
||||
|
@ -669,7 +669,7 @@ FROM (SELECT ST_BuildArea(
|
|||
<title>Description</title>
|
||||
|
||||
<para>Returns <varname>TRUE</varname> if the <varname>LINESTRING</varname>'s
|
||||
start and end points are coincident.</para>
|
||||
start and end points are coincident. For Polyhedral Surfaces, it tells you if the surface is areal (open) or volumetric (closed).</para>
|
||||
|
||||
<para>&sfs_compliant;</para>
|
||||
<para>&sqlmm_compliant; SQL-MM 3: 7.1.5, 9.3.3</para>
|
||||
|
@ -681,11 +681,14 @@ FROM (SELECT ST_BuildArea(
|
|||
|
||||
<para>&Z_support;</para>
|
||||
<para>&curve_support;</para>
|
||||
<para>Availability: 2.0.0 support for Polyhedral surfaces was introduced.</para>
|
||||
|
||||
<para>&P_support;</para>
|
||||
|
||||
</refsection>
|
||||
|
||||
<refsection>
|
||||
<title>Examples</title>
|
||||
<title>Line String and Point Examples</title>
|
||||
|
||||
<programlisting>postgis=# SELECT ST_IsClosed('LINESTRING(0 0, 1 1)'::geometry);
|
||||
st_isclosed
|
||||
|
@ -716,6 +719,34 @@ postgis=# SELECT ST_IsClosed('MULTIPOINT((0 0), (1 1))'::geometry);
|
|||
-------------
|
||||
t
|
||||
(1 row)</programlisting>
|
||||
</refsection>
|
||||
|
||||
<refsection>
|
||||
<title>Polyhedral Surface Examples</title>
|
||||
|
||||
<programlisting>
|
||||
-- A cube --
|
||||
SELECT ST_IsClosed(ST_GeomFromEWKT('POLYHEDRALSURFACE( ((0 0 0, 0 0 1, 0 1 1, 0 1 0, 0 0 0)),
|
||||
((0 0 0, 0 1 0, 1 1 0, 1 0 0, 0 0 0)), ((0 0 0, 1 0 0, 1 0 1, 0 0 1, 0 0 0)),
|
||||
((1 1 0, 1 1 1, 1 0 1, 1 0 0, 1 1 0)),
|
||||
((0 1 0, 0 1 1, 1 1 1, 1 1 0, 0 1 0)), ((0 0 1, 1 0 1, 1 1 1, 0 1 1, 0 0 1)) )'));
|
||||
|
||||
st_isclosed
|
||||
-------------
|
||||
t
|
||||
|
||||
|
||||
-- Same as cube but missing a side --
|
||||
SELECT ST_IsClosed(ST_GeomFromEWKT('POLYHEDRALSURFACE( ((0 0 0, 0 0 1, 0 1 1, 0 1 0, 0 0 0)),
|
||||
((0 0 0, 0 1 0, 1 1 0, 1 0 0, 0 0 0)), ((0 0 0, 1 0 0, 1 0 1, 0 0 1, 0 0 0)),
|
||||
((1 1 0, 1 1 1, 1 0 1, 1 0 0, 1 1 0)),
|
||||
((0 1 0, 0 1 1, 1 1 1, 1 1 0, 0 1 0)) )'));
|
||||
|
||||
st_isclosed
|
||||
-------------
|
||||
f
|
||||
|
||||
</programlisting>
|
||||
</refsection>
|
||||
|
||||
<refsection>
|
||||
|
|
Loading…
Reference in a new issue